Factor’s New Sarana Brings Race-Day Speed to Ultra-Endurance Gravel

Factor has a new bike called the Factor Sarana, and at its heart, the goal was simple: make the perfect bike for ultra multi-surfaced racing. With the likes of Rob Britton continuing to be a foundational rider of the brand and his exploits continuing to stretch longer in distance, Factor made a gravel bike that matched that progression.

The new Factor Sarana is the result. The bike, launched the day that Britton started the Traka 560 ultra-race, offers a slew of features that target specific ultra-racing goals. Yet, in true Factor form, the bike has not given in to some of the slower aspects of typical bikepacking or adventure bikes.

Clearance, for instance, extends all the way to 2.2 inches. Stack and reach, however, remain in the realm of racing geometry rather than relaxing into something more compromising.

With athletes like Britton leading the charge, riders who are bringing the speed of a former Tour of California stage winner to long-haul gravel efforts, this unorthodox approach derives from a premise for ultra-endurance racing that Factor found along the way: How can a race bike stay fast when the rider can no longer think about speed? 

This is how Factor answered that question.

The key features of the Factor Sarana

Factor is a brand that is unapologetically built around racing. With premium price-points, aerodynamic emphasis across its road and gravel lineups, and a deep bench of elite athletes, the brand has distinguished itself as a brand that doesn’t wade into waters without a finish line.

With that ethos, it makes sense that traditionally Factor hasn’t had a bike to logically pair with the long-bomb characteristics of ultra-racing. Traditionally speaking, the racing in ultra events has been more about persistence rather than speed.

Nevertheless, that is changing rapidly, and Factor’s very own Rob Britton is a big reason why. The Canadian retired from road racing in 2021, and like so many of his peers, Britton wound up racing gravel. But Britton’s progression didn’t stop there. Instead, Canada just kept pushing the distance further through big FKT missions around his home province of British Columbia, leading to a win and record at Unbound XL last year. From that drive to go further, and still carry as much of the persistent speed in Britton’s legs, the Sarana was born.

Factor could make a highly specific, race-driven bike that was built specifically to play in the ultra-racing sandbox: “We weren’t trying to make endurance easier,” Graham Shrive, Factor’s chief engineer, said of the Sarana project. “We were trying to make it faster.”

A front-end built for the long haul, but with restraint 

When it comes to building an adventure-oriented gravel bike, normally that means the geometry of the front of the bike is pushed longer and slacker. For instance, pushing the front wheel out, by either increased fork offset or a slacker head tube angle, provides more stability — a common goal of bikes heading into unknown terrain. Nevertheless, there are trade-offs. With a slacker front end, bikes do lose a bit of their agility, especially on smoother terrain.

Compared to other adventure-oriented bikes, the Sarana does not slacken the front end of the bike much at all, and instead keeps the head tube angle relatively steep and the fork offset moderate in order to preserve a feeling of agility. The bike does have suspension-corrected geometry, with a shorter headtube to allow for 30mm of added suspension without changing the overall geometry, but it doesn’t raise the stack all that much. The stack of 593mm for a size 56 frame, for instance, is just 13mm taller than the stack on a 56cm Ostro Gravel, Factor’s most road-adjacent gravel frame.

Similarly, the reach of the frame is also fairly in line with the rest of Factor’s gravel line-up. All of this is to keep Factor’s racing DNA present in the Sarana’s construction.

Compliance through the leaf-spring seat-stay system

Geometrically, the Sarana is very much a tale of two halves. While the front-end of the bike is fairly traditional with its small suspension correction and moderate head-tube angle, the rear of the bike is much more specific. The rear triangle is finely tailored to add vertical compliance to improve comfort and speed over rough terrain through long race efforts across variable terrain.

Through leaf-spring shaping, seat stays that are dropped to the extreme, and an offset seat tube, the bike is filled with flourishes to allow the rear of the bike to have generous vertical movement. To add to the geometry, Factor used a finely tuned directional carbon fiber layup to allow even more vibration-damping vertical compliance throughout the back of the bike, while retaining key horizontal stiffness. Factor is no stranger to a dropped seat stay, but on the Sarana, this is taken to the extreme as the rear end of the bike is much lower and a few millimeters longer than Factor’s two other gravel bikes.

The combination of a longer overall wheelbase and 80mm of bottom bracket drop unlocks the bike’s ability to handle large tires. This delivers the complementary handling required for racing hundreds of miles in a single push.

The Sarana comes with a brand new wheelset, the Black Inc Forty Six

Like Roval’s relationship to Specialized or Bontrager with Trek, Factor has a sister component company called Black Inc, which manufactures wheels, bars, and seat posts for Factor frames. With the Sarana offering a new type of gravel bike for the brand, Black Inc followed suit with a new wheelset to match the ultra-endurance ethos of the bike.

The Forty Six is a wheelset that hits many of the familiar beats of modern gravel wheelsets. As the name suggests, the wheels are 46mm deep with a broad 27mm internal width optimized for tires from 45-57mm. Steel-bladed spokes provide a balance of aerodynamics and structure, while the hub features high-polished stainless steel bearings and a larger freehub engagement design. That creates a durable hub that is quick to engage, offering a 25% increase in engagement over Factor’s standard road hubs.

The wheels come stock on Sarana stock builds and are also sold separately. The MSRP for a Black Inc Forty Six wheelset is $1,699 USD / €2,049 EUR / $2,249 CAD / $2,899 AUD / £1,649 GBP.

The Factor Sarana’s Geometry 

Pricing, builds, and availability

Factor makes no bones about the fact that the Sarana is not like the other bikepacking bikes on the market. So, it shouldn’t come as a surprise that the bike doesn’t have the same amount of mounts or compatibilities as other bikes in its category.

Yet, in a few key ways, the Factor Sarana does deliver a platform that offers key points of flexibility that serious cyclists will love to see. A T47 bottom bracket, round 30.9 mm dropper-compatible seatpost, and chainring clearances up to 52t offer a ton of user-friendly customization throughout the frame.

In terms of build options, the Sarana comes in a few different options, with stock builds including a frameset, a frameset with Rock Shox suspension, and SRAM Force or Red XPLR groupsets.

The Sarana is now available online on the Factor website and at select Factor retailers. We do have the bike in for review with Josh Ross up in the Pacific Northwest, so expect more from us as we put the bike through its paces on big rides in rough places.